Disposable toothbrush



FIG. 1 is a right side perspective view of a disposable toothbrush showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is left side elevation view thereof;

FIG. 5 is right side elevation view thereof;

FIG. 6 is top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a disposable toothbrush, as shown and described. 